[Koha] Database upgrade problems from KOHA 19.05 to KOHA 21.11

[Harald Schaefer]

Dear all,

now I am promoted from a plain KOHA user to the system administrator of 
the computer hosting a KOHA installation of a railway museum in Germany.

My first task was to upgrade the system from Ubuntu 16.04 to 20.04 and 
upgrading the KOHA system. I have tried this first twice on some local 
copies. In the test runs the database upgrade works fine.

In the update run of the production system it stops at this point:

Upgrade to 20.12.00.049  [19:01:13]: Bug 28108 - Move action logs 
'SERIAL CLAIM' and 'ACQUISITION CLAIM' to a new 'CLAIMS' module
Upgrade to 20.12.00.050  [19:01:13]: Bug 28108 - Add new 
systempreference OpacHiddenItemsHidesRecord
Upgrade to 21.05.00.000  [19:01:13]: Koha 21.05.00 release

Log started: 2022-03-29  19:04:34 # some other program

In thetest runs it continues

Upgrade to 21.05.00.000  [17:49:33]: Koha 21.05.00 release
Upgrade to 21.06.00.000  [17:49:33]: Increase DBRev for 21.06
         Run, rabbit run. 
        Dig that hole, forget the sun,
        And when at last the work is done
        Don't sit down it's time to dig another one.

The rabbitmq log show these entries for the time

2022-03-29 19:00:36.018 [info] <0.595.0> started TCP listener on [::]:5672
2022-03-29 19:00:36.018 [info] <0.266.0> Running boot step cluster_name 
defined by app rabbit
2022-03-29 19:00:36.018 [info] <0.266.0> Running boot step direct_client 
defined by app rabbit
2022-03-29 19:00:36.158 [notice] <0.103.0> Changed loghwm of 
/var/log/rabbitmq/rabbit at tools.log to 50
2022-03-29 19:00:36.496 [info] <0.8.0> Server startup complete; 0 
plugins started.
2022-03-29 19:03:25.195 [info] <0.777.0> rabbit_stomp: default user 
'guest' enabled
2022-03-29 19:03:25.281 [info] <0.793.0> started STOMP TCP listener on 
[::]:61613
2022-03-29 19:03:25.329 [info] <0.765.0> Plugins changed; enabled 
[amqp_client,rabbitmq_stomp]
2022-03-29 19:03:27.678 [info] <0.800.0> RabbitMQ is asked to stop...

Is there any way to continue the database upgrade? I have other 
applications running on the system and I do not want to start the 
complete upgrade process again.

It seems that the not executed scripts are in 
/usr/share/koha/intranet/cgi-bin/installer/data/mysql/db_revs

Basically the upgraded KOHA is running.

Best regards Harald